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Definition of BSL-4

BSL-4: Biosafety level 4. The highest level of biosafety. This level is used for the diagnosis of exotic agents such as the Ebola virus that pose a high risk of life-threatening disease, which may be transmitted by the aerosol route and for which there is no vaccine or therapy.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/14/2012

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